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3 years ago

What is (-5/4) + 75/40 + 100% Please help and explain.

Mathematics

1 answer:

Gre4nikov [31]3 years ago

6 0

I think its 100.625... hope this helps :)

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Kendra was asked to find the number of students who planned to attend the evening sympothy performance. She was told that 40 per

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Answer:

It's B

Step-by-step explanation:

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3 years ago

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A distribution of values is normal with a mean of 188 and a standard deviation of 20.8. Find the probability that a randomly sel

padilas [110]

Answer:0.8413

Step-by-step explanation:

Mean= 188, Std Dev. =20.8, Z=(x-mean)/Std Dev

P(X less than 167.2)= P(Z less than (167.2-188)/20.8)

=P(Z less than (-20.8/20.8))

=P(z less than -1)= P(Z less 1)

The value of 1 in the normal distribution table is 0.3413

So we add 0.5 to 0.3413 =0.8413

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3 years ago

Use the normal distribution of SAT critical reading scores for which the mean is 502 and the standard deviation is 116. Assume t

PSYCHO15rus [73]

Answer:

(a) 93.19%

(b) 267.3

Step-by-step explanation:

The population mean and standard deviation are given as 502 and 116 respectively.

Consider, <em>X</em> be the random variable that shows the SAT critical reading score is normally distributed.

(a) The percent of the SAT verbal scores are less than 675 can be calculated as:

$P(X$

Thus, the required percentage is 93.19%

(b)

The number of SAT verbal scores that are expected to be greater than 575 can be calculated as:

$P(X>575)=P(\frac{x-502}{116}>\frac{575-502}{116}\\P(X>575)=P(Z>\frac{575-502}{116})\\P(X>575)=P(Z>0.6293)\\P(X>575)=0.2673$

So,

Out of 1000 randomly selected SAT verbal scores, 1000(0.2673) = 267.3 are expected to have greater than 575.

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3 years ago

BRAINLYEST FOR FIRST PERSON AND 5 STARS!!!!!!!!!!! simplify 3 x 5/6=

ale4655 [162]

Answer:

1st= 2 1/2

2nd= ???

3rd= 1/3

4th= 1/7

5th= 5/144

Step-by-step explanation:

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3 years ago

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Please i need help with this i dont understand it

CaHeK987 [17]

Answer:

1. No

2. Right triangle

3. No

4. Right triangle

Step-by-step explanation:

A, B = two smallest sides

C = hypotenuse, largest side

Pythagorean theorem. If A^2 + B^2 = C^2, then you have a right triangle.

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3 years ago